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<H1>[Nel] ugh, C++ is so obtuse</H1>
<B>Cyril Corvazier</B>
<A HREF="mailto:corvazier%40nevrax.com"
TITLE="[Nel] ugh, C++ is so obtuse">corvazier@nevrax.com</A><BR>
<I>Wed, 14 Mar 2001 16:57:42 +0100</I>
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<PRE>><i>
</I>c++ -I/usr/local/include/freetype2 -I/home/pierre/STLport-4.0/stlport -g -O2
><i> -o client character_interface.o client.o language_interface.o
</I>><i> login_interface.o move_listener.o pb_message_box.o player_view.o
</I>><i> shards_list_interface.o sight.o
</I>><i>
</I>lens_flare.o -lnelnet -lnelmisc -lnel3d -L/usr/local/lib -lfreetype -L/home/
><i> pierre/STLport-4.0/lib -lstlport_gcc
</I>><i> /usr/local/lib/libnel3d.so: undefined reference to
</I>><i> `NL3D::CTrackKeyFramerLinear<NL3D::CKeyQuat, NLMISC::CQuat> type_info
</I>node'
><i> /usr/local/lib/libnel3d.so: undefined reference to
</I>><i> `NL3D::CTrackKeyFramerLinear<NL3D::CKeyQuat,
</I>NLMISC::CQuat>::getValue(void)
><i> const'
</I>
I have fixed that bug. It should be on the cvs tonight (GMT+1).
*** For c++ addicts, here is the problem ***
The link failed under GCC when we use non-inline functions in a template
implementation.
No problem with Visual C++ 6.0.
It looked like this:
in the .h file:
-----------
// Two template classes
template<class T>
class a
{
virtual void toto()=0;
};
template<class T>
class b : public a<T>
{
virtual void toto()
{
...
};
};
// The second one is implemented, but toto function body is in the .cpp
file.
class b<int> : public a<int>
{
virtual void toto();
};
In the .cpp:
-----------
virtual void b<int>::toto()
{
...
};
The fixe was to let the toto body inline in the header.
Any comments ?
---
Cyril Corvazier
Lead 3d programmer
Nevrax France
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